Looking over how I organize papers on my desk, I see that many documents overlap. Still, while I'm working, I lay things out so that the content that I'm working with or comparing against one another doesn't overlap. You don't work with anything that's buried three papers deep.

Metro still needs more freedom to optimize layout to content. For many things, snapping doesn't cut it, and obstinately wastes screen space to display absolutely nothing of use other than the app's background color.

They added new disk info/options in the PC Settings menu. You now get more info about disk space and what is using what. There is also the ability to empty the recycle bin now but IMO they should add the recycle bin itself to metro some way. Making it a tile/app is one way but maybe it could be better as a entry in the user menu under logout or something. You could drop it into the settings charm as well, take the power button out since it's now on the start screen itself and put a recycle bin button there.

Why are you trying to work in Photoshop, then want windows over top of it? If you have windows over top of Photoshop, then you are not working in Photoshop...

Except if you're drag/dropping stuff from one window into another, a common action for both Photoshop itself when having several document windows open, and other programs used in combination with Photoshop.

Drag and drop -- another thing to add to the long list of things wrong with Metro apps in general.